Answer: b
Explanation: By stratification is understood a layered arrangement in a sedimentary rock. This may be developed very prominently and can be seen from a distance of miles or in other cases may have to be ascertained after close examination of the rock.

Answer: b
Explanation: Tabular false bedding is a type of cross bedding in which the top and bottom surfaces of the deposit are essentially parallel, indicating its deposition in the same main channel.

Answer: d
Explanation: In the case of wedge shaped cross bedding, the cross-bedding structure is highly complex: the individual layers exist in well-defined sets of parallel layers but these sets bear angular relationship to each other.

Answer: c
Explanation: In some stratified rocks the component sediments in each layer appear to be characteristically sorted and arranged according to their grain size, the coarsest being placed at the bottom and the finest at the top.

Answer: a
Explanation: Mud cracks are common structural features of many fine-grained sedimentary rocks. The structure consists of polygonal or irregular cracks spread along the surface of an exposed sedimentary layer.

12. Which of the following does not provide evidence of shallow water environment?
a) Lamination
b) Rain prints
c) Ripple marks
d) Mud cracksView Answer

Answer: a
Explanation: The mud cracks, rain prints and ripple marks when encountered in sedimentary formations are taken as confirmatory evidence of the formation having been deposited in a shallow water environment.

Answer: b
Explanation: The pisolitic structure is another type of concretionary structure where, the individual size of a concretion is like that of a peanut. Limestones and bauxite show both these structures.